CA1321337C - Detergent powders and process for preparing them - Google Patents

Detergent powders and process for preparing them

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Publication number
CA1321337C
CA1321337C CA000598302A CA598302A CA1321337C CA 1321337 C CA1321337 C CA 1321337C CA 000598302 A CA000598302 A CA 000598302A CA 598302 A CA598302 A CA 598302A CA 1321337 C CA1321337 C CA 1321337C
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Prior art keywords
base powder
alkali metal
powder
metal aluminosilicate
nonionic surfactant
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Expired - Fee Related
Application number
CA000598302A
Other languages
French (fr)
Inventor
Peter Cory Knight
Thomas Taylor
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Unilever PLC
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Unilever PLC
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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/06Powder; Flakes; Free-flowing mixtures; Sheets
    • C11D17/065High-density particulate detergent compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02Inorganic compounds ; Elemental compounds
    • C11D3/12Water-insoluble compounds
    • C11D3/124Silicon containing, e.g. silica, silex, quartz or glass beads
    • C11D3/1246Silicates, e.g. diatomaceous earth
    • C11D3/128Aluminium silicates, e.g. zeolites

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)

Abstract

C.3243 US CLAIMS

ABSTRACT

A process for the preparation of a free-flowing detergent powder comprises the steps of (i) mixing a detergent base powder with finely divided zeolite in a weight ratio of the zeolite (hydrated basis) to the base powder of from 0.13:1 to 0.40:1, whereby the small zeolite particles are adhered to the outer surfaces of the larger base powder particles, and (ii) spraying a liquid composition comprising nonionic surfactant onto the mixture formed in step (i), at a weight ratio of nonionic surfactant to alkali metal aluminosilicate of at least 0.25:1. This improves flow properties, increases bulk density, and improves dispensing in an automatic washing machine.

Description

~32~337 `:

- 1 - C. 3243 orr~Ao~r ~oM~
AND PROCESS FOR PREPARING THEM
~ , ' ' .

5 TECHNICAI, FIELD
:
The present invention relates to detergent powders and processes for preparing them. It is of especial applicability to~powders containing no, or reduced levels of, phosphate builders and to powders o high bulk density.

BACKGROUND

. - :, In recent years the trend in detergent compositions has been towards reducing or eliminating phosphate builders. The replacement of sodium tripolyphospha~e as a bullder in powdered detergent composition~ by ~ :
crystalline sodium aluminosilicate (zeolite) and~br by sodium carbonate has led to a number of difficulties with the structure and properties of the powder. One such problem that has been encountered is the tendency to ~.
ci .,, . ~ ,.. ,- .. , ;. .; - .. , :: .,.

:IL32~337 - 2 - C.3243 dispense less Wt~ll in front-loading automatic washing machines than do similar phosphate-built powders: a higher proportion of the powder dosed into the machine is left behind în the dispenser, leading to product wastage and clogging. This problem is especially marked at the low wash temperatures now preferred for energy-saving reasons.

Another problem observed with zeolite-built powders is a relatively high level of insoluble matter deposited on the machine surfaces or on the washed fabrics.

Both these problems have been exacerbated by the recent trend in the detergents industry towards higher bulk density powders.

We have now found that high bulk density powders having improved flow and dispensing properties and low levels of insoluble matter can be prepared by coating the particles of a detergent base powder with a relatively large amount of finely divided zeolite powder, and then spraying on a liquid binder comprising nonionic surfactant.

PRIOR ART
'':
JP d4 41680B ~Kao) discloses a process in which a detergent base powder is mixed with up to 10~ by weight, preferably 5% by weight, of finely divid~d (0.1-30 micxons~ crystalline or non-crystalline material selected from sodium aluminosilicate, calcium silicate, calcium carbonate, magnesium silicate and sodium carbonate, and a sticky binder, for example, a dihydric alcohol-ethylene oxide adduct, is simultaneously or subsequently sprayed on ~32~33~
- 3 - C.3243 in a ratio to the finely divided powder of 0.2 : 1 to 1 :
1. ' GB 1591517 (Colgate~Palmolive) discloses in claims 7 to 14 a process in which sodium tripolyphosphate and zeolite particles are mixed to form base beads with subsequent addition of liquid nonionic detergent.
Optionally, suc~ particles may be coated with further nonionic detergent followed by layering with fine zeolite particles. The reverse order of addition of zeolite and nonionic surfactant is not disclosed.

JP 61 069 897A ~Kao) discloses in Example 2 a process in which 100 parts of spray-dried based powder are pulverised in a Fukae mixer, 4.6 parts of nonionic surfactant and 17 parts of aluminosilicate micropowder are added, and the mixture is granula~ed in the Fukae mixer.
The weight ratio of zeolite to base is 0.17:1 and the weight ratio of nonionic surfactant to zeolite is 0.27:1.
No further aluminosilica~e is added after granulation.
.
EP 61 296A ~Unilever) discloses a process in which a spray-dried base powder containing anionic surfactant and silicate is admixed with zeolite and a liquid binder, for example nonionic surfactant, then dried. Zeolite to hase powder weight ratios in the Examples range from 0,65:1 to 1.33:1. Nonionic surfactant to zeolite weight ratios are comparatively low, ranging from 0.09:1 to 0.18:1 DEFINITION OF THE INVENTION
_ The pxesen* invention provides a process for the preparation of a free-flowing detergent powder, which comprises the steps of li) mixing a detergent base powder comprising one or more detergent~active ~ . :

. ~ ,. ~ : , ,: :
- 4 - C.3243 : . ' compounds and one or more detergency builders with finely divided alkali metal aluminosilicate in a weight ratio of the alkali metal aluminosilicate (hydrated basis) to the base powder of from 0.13:1 to 0.40:1, whereby particles of crystalline sodium aluminosilica~e are adhered to the outer surfaces of the particles of the base powder; and ~ii) spraying a liquid composition comprising nonionic surfactant onto the mixture formed in step (i~, at a weight ratio of nonionic surfactant to alkali metal ~ .
aluminosilicate of at least 0.25:1.

The învention also provides a detergent powder prepared by the process defined in the previous paragraph.

DETAILED DESCRIPTION OF THE_INVENTION
.
In step (i) of the process~ of the invention, ~inely : .
divided alkali metal aluminosilicate:~zeolite) is coated or "layered" onto the much larger particles of a detergent base powder. This simulkaneously improves flow and other powder properties, for example, compressibility, and also :
raises bulk density. The amount o~ zeolite used in comparison to the base powder:is so chosen as to allow for adequate "layering" and to increase the bulk density significantlyO The weight ratio of added zeolite (hydrated basis) to base powder is from 0~13 : 1 to : :
0.40:1, preferably from 0.15 : 1 to 0.35 : 1, and desirably from 0.20 : 1 to 0.33 : 1. -The preferred alkali metal aluminosilicate for use in the process of the invention is crystalli~e sodium aluminosilicate (zeolite), more preferabIy Type A zeolite.

~32~3~7 - 5 ~ C.3243 The process of the invention allows a base powder having a relatively low level of zeolite to be prepared~
thus keeping to a minimum the problems associated with processing zeolite through a slurry and a spray-drying tower, and then bringing the level of zeolite up to that desired for good detergency building by "layering" in accordance with the invention.
-~ .
Because "layering" of a substantial level of zeolite in accordance with the invention also raises the bulk density significantly, the process also allows a base powder of relatively low bulk density (less than 500 kg/m3, for example, 400 to 500 kg/m3} to be prepared and the bulk density brought to a desired high valuel for example, above 500 kg/m3, by appropriate choice of the level of "layered" zeolite. This procedure thus keeps to a minimum the problems associated with the production of a high bulk density spray-dried base powder having acceptable flow and other powder properties.
It is therefore clear that the process of the invention is of especiaI applicability to the treatment of base powders prepared by spray-drying. It is within the scope of the invention, however, for the base powder to be prepared by any suitable tower or non-tower method.

It is also clear that the process of the invention is espe~ially relevant to the treatment of base powders containing alkali metal aluminosilicate. Preferably the amount of alkali metal aluminosilicat~ (anhydrous basis) in the base powder does not exceed 50% by weight. It is also within the scope of the invention for the base powder to be free of aluminosilicate. Whether or not aluminosilicate is present, the base powder may advantageously contain sodium carbonate, as builder and/or as pH regulator.

i, , ' ,,~ , ' , ' ~' , ' ~:
- ' ' .' ' ' I

,.. :,, ' . :.

~32~33~
- 6 - C.3243 The base powder is preferably substantially free of inorganic phosphate builders.

The process of the invention is also especially useful for the treatment of a base powder con aining a relatively high level, for example, at least 20~ by weight, of detergent-active compounds. Such base powders can exhibit poor flow properties and a tendency to cake, and "layering" with aluminosilicate in accordance with the invention can bring about significant improvements in these respects.

According to step (ii~ of the invention, after admixture of the aluminosilicate a liquid binder consisting of or comprisi~g nonionic surfactant is sprayed onto the "layered" powder. It has been surprisingly found that if nonionic surfactant is sprayed on in a weight ratio of at least 0 . 25 : 1, based on the added aluminosilicate, the dispensing behaviour of the powder in an automa~ic washing machine can be substantially improved. The preferred weight ratio of nonionic surfactant to aluminosilicate (hydrated basisl is from 0.25 : 1 to 1 : 1~ more preferably at least 0.30 . 1, and most preferably from 0.30 o I to 0.70 : 1.
This process of the invention results in reductions of dispenser residue (as hereinafter defined) of 20~ by weight or more, preferably of at least 30~ by weight, if the base powder has poor dispensing characteristics. ;
This embodiment is therefore e~specially useful for the treatment of base powders giving dispenser residues of 30~
by weight or more, especially those giving residues of 50%
by weight or more, and more especially those giving residues of 70% by weight or more. Such base powders include in particular zero-phosphate compositions built with zeolite, sodium carbonate or a combination o~ the :
. `' ~

_ 7 ~ 3 ~C.3243 two; powders containing less than 10~ by weight (or no) sodium silicate; and powders having a bulk density of 550 kg/m3 or more. The preferred ratios for nonionic surfactant to added aluminosilicate given above apply especially to such powders; ratios outside those ranges are also within the scope of the invention because with other types of base powdex they can give benefits.

The dispenser residue is the (dry) weight percentage of the total powder dose (100 g) left behind in the dispenser of a Philips (Trade Mark) AWB 126/7 front-loading washing machine operated usiny 5 litres of water at 20C flowing in over a period of 1 minute.
These conditions of low water temperature and slow fill are deliberately chosen to be more severe than those likely to be encountered in normal usage, and the machine used for the test is one having a drawer-type dispenser that is particularly vulnerable to poor dispensing and clogging.
Any nonionic surfactant that is sufficiently liquid at ambient or slightly higher temperature (up to about 60C) may be used in the process of the inventionO
Suitable nonionic surfactants include the primary and secondary alcohol ethoxylates, especially the Cl~-C15 primary and secondary alcohols ethoxylated with 3-10 moles of ethylene oxide per mole of alcohol.

Step (i~ of the process of the invention may be carried out in any suitable apparatus that provides thorough but not too vigorous mixing. The mixing conditions should be such as to break up any agglomerates in the aluminosilicate without breaking up the base powder particles. A pan granulator, concrete mixer or continuous drum mixer is suitable. Spraying on of :: - : . ~

' ;. '' ' ~: :~

~ 3~:~3~`~
- 8 - C.3243 nonionic surfactant in step (ii) may be carried out by any suitable method.

The base powder contains, as essential components, one or more detergent-ac~ive compounds and one or more detergency builders, and it may of course contain other conventional ingredients.

The base powder may contain detergent-active compounds (surfactants) of any type~ Of particular interest are anionic surfactants and nonionic surfactants.
Both types are well known to those skilled in the art.
Preferred detergency builders are zeolite and/or sodium carbonate. O~her builders that may additionally or lS alternatively be present include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers or acrylic phosphinates; monomeric polycarboxylates such as nitrilotriacetates, citrates and ethylenediaminetetraacetates; and many other materials known to the skilled detergent formulator. If desired the base powder may contain sodium silicate; in the case of a spray-dried base powder containing aluminosilicate, however, the amount should not be so high that unacceptable levels of insoluble siliceous species are formed by reaction between aluminosilicate and silicate in the slurry.

Other materials that may be present in powders prepared by the process of the invention include fluorescers, antiredeposition agents, inorganic sal~s such as sodium sulphate, enzymes, lather control agents, bleaches, bleach activators and bleach stabilisers~ As is well known to the skilled formulator, some of these materials are not suitable for undergoing lurry-making and spray-drying, and are preferably not included in a spray-dried base powder: such materials are `` ~L321337 : ~ 9 - ~.3243 advantageously postdosed after the aluminosilicate "layering" of the invention. This restriction does not necessarily apply to base powders prepared by non-tower methods, but it may still be advantageous to postdose certain ingredients, notably bleaches, enzymes and lather control agents.

The invention is further illustrated by the following non-limiting Examples, in which parts and percentages are by weight unless otherwise stated.

~ . ::: , ::- .. :.,, : : .- : .

~32~3~
- 10 - C.3243 EXAMPLES

~ . .
:~
A base powder (Control A) was prepared to the composition shown below by spray-drying an aqueous slurry:
~.
Parts , Sodium alkylbenzene sulphonate 9.0 23.75 Nonionic surfactant 1.0 2.64 Zeolite HAB A40 ~anhydrous basis) 16.0 42.22 ;:

Sodium carbonate 2.0 5.28 Sodium polyacrylate 4.0 10.55 ~;~
Minor ingredients 0.84 2.22 Water 5~06 13.35 ______ _____, 37.9 100.00 : ' "
This powder had a Rosin-Rammler mean particle size of 550 microns.

3 parts of liquid nonionic surfactant were sprayed vnto this powder (Control B3~ Variou~ amounts of Type A ~ :.
zeolite tWessalith ~Trade Mark) P ex Degussa) were admixed with samples of Control A, as shown in Table 1, in a baffled rotating mixer for 5 minutes; in Examples 1 to 3, nonionic surfactant (3 parts) was then sprayed on while mixing was continued. Comparative Example C did no~ have ~ :~

~2~337 - 11 - C.3243 nonionic surfactant sprayed on; comparative Examples D and E have nonionic : zeolite ratios of less than 0.25:1, alsc Example E has a zeolite : base powder ratio greater than 0.40:1. The p.roperties of the resulting powders are shown in Table 1.

, .

,, : , .: : , - :: . : -: : . : -: :.. .: .
, ., :: ~ :, : ~

~L32~33~ :
: - 12 - C.3243 . ~ .

Table 1 -:' A B C
Parts:

Base powder 37.9 37.9 37~9 ;: :

Nonionic surfactant ~ 3.0 ~ -Zeolite (hydrated) - - 10.0 "
Total 37.9 40.9 47.9 ~ : .

Weight ratios: : .
, zeolite : base powder - - 0.26 nonionic : zeolite :; ~ 0 '' 25 Properties: .

Bulk density (kg/m3~514 475 595 Flow rate (ml/s) 105~ 64 105 Compressibility (% v/v~ 25 34 16 Dispensex residue (~) lO0 100 100 '~

'~

. . ! ~ ' ', - , ' ; ". ~, ' :. : ` `: . : . '' ' - 13 - C.3243 Table 1 ~continued) , _ Parts:

Base powder 37.9 37.9 37.9 Nonionic surfactant 3.0 3.0 3.0 Zeolite (hydrated) 5.0 7.5 10~0 Total 45.9 48.4 50.9 ~, : ;
:.
Weight ratios: ~ ~

zeolite : base powder 0.13 0.29 0.26 nonlonic : zeolite ; 0.6 0~4 : 0.3 :, ~

25 Properties: :
., Bulk density (kg/m~) 573 633 618 Flow rate (mlJs) 100 114 114 Compressibility ~ v/v) 15 19 18 Dispenser residue (~) 75 55 60 . . . :,. , , , . . : : : . " -; ,:,: :,; , . ,. ,; . . . ; : . : .: : ~

14 _ ~ 32~ ~3 ~C.3243 Table 1 (continued) D E
Parts~
Base powder 37.9 37.9 .
Nonionic surfactant 3.0 3.0 .
~eolite Ihydrated) 15.0 20.0 : ,` "
Total 55.9 60O9 ~ -.

, ,, -, :: ~ :
Weight ratios:
zeolite : bas~ powder 0.40` 0~53 nonionic : zeoli e ~ 0.2 0.15 ~ :

: :Proper~les:
~: ~
Bulk density (kg/m ) 585 600 :
Flow rate (ml/s) ` 97 93 ~ , Compressibility (~ v/v~ 25 33 Dispenser residue (8~ 100 100 ~ ~ , ,'' :

~''-':

~:
;

~213~ 1 - 15 - C.3~43 Examples 4 to 6 The procedure of Examples 1 to 3 was repeated using a higher level (4.C parts~ of sprayed-on nonionic surfac~ant. The results are ~hown in Table 2. As in previous Examples, each powder contained 37.9 parts of base powder A. Control F was the base powder Control A
with 4.0 parts of nonionic surfactant sprayed on.
Table 2 Zeolite (hydrated) - 7.5 10.0 1205 Total 41.9 49.4 51.9 53.4 20 zeolite : base - 0.20 0.26 0.33 nonionic : zeolite ~ 0.53 0~40 0~32 ~5 Bulk density (kg/m ) 460600 617 615 Flow rate (ml/s) 0 120 120 120 Compressibility (%~ 4025 : 22 22 Dispenser residue (~)10040 70 70 The large effect on bulk density, powder properties and dispenser residues at this nonionic surfactant level :~
will be noted.

~ ! ' , ~ . ' ! ; ;,, , , . ~ , '`:' ' ' ' ' :` ,, '. '' , '','. ' ., ''' ' . , ' ,~:

13~.1L 337 - 16-- C~3243 Examples 7 $o 10 ~ `-The procedure o~ Examples 4 to 6 was repeated using a `
higher level ~5.0 parts) of sprayed-on nonionic surfactant. The results are shown in Table 3. As in previous Examples, each powder contained 37.9 parts of base powder A. Control G was the base powder Control A
with 5.0 parts of nonionic surfactant sprayed on.

Table 3 Parts: G 7 Zeolite ~hydrated) - 5.0 Total 42.9 47.9 15 zeolite : base powder - 0.13 nonionic O zeolite - 1.0 Bulk densi~y (kg/m3) 450 557 Flow rate (ml/s~ 0 78 20 Compressibility (~ v/v) 50 28 Dispenser residue (~) lO0 75 .
Table 3 icontinued~
Parts: ~ 8 9 lO

Zeolite (hydrated)7.5 10.0 12.5 ~
Total 50,4 52.9 54.4 :

z~olite o base powder0.20 0.26 0.33 ~ .
nonionic : zeolite 0.67 0.5 0~4 ;

Bulk density Ikg/m ~ 610 600 633 Flow rate (ml/s~ 111 114 120 Compressibility (% v/v) 20 21 18 Dispenser residue (~)40 50 35 ~.

Claims (23)

1. A process for the preparation of a free-flowing detergent powder, which comprises the steps of (i) mixing a detergent base powder comprising one or more detergent-active compounds and one or more detergency builders with finely divided alkali metal aluminosilicate in a weight ratio of the alkali metal aluminosilicate (hydrated basis) to the base powder of from 0.13:1 to 0.40:1, whereby particles of alkali metal aluminosilicate are adhered to the outer surfaces of the particles of the base powder;
and (ii) spraying a liquid composition comprising nonionic surfactant onto the mixture formed in step (i), at a weight ratio of nonionic sulfactant to alkali metal aluminosilicate of at least 0.25:1.
2. A process as claimed in claim 1, wherein the weight ratio of alkali metal aluminosilicate to base powder is from 0.15 : 1 to 0.35 : 1.
3. A process as claimed in claim 2, wherein the weight ratio of alkali metal aluminosilicate to base powder is from 0.20 : 1 to 0.33 : 1.
4. A process as claimed in claim 1 wherein the aluminosilicate is present as the crystalline sodium salt.

- 18 - C.3243
5. A process as claimed in claim 1, wherein the alkali metal aluminosilicate is Type A zeolite.
6. A process as claimed in claim 1, wherein nonionic surfactant is sprayed on in a weight ratio to the alkali metal aluminosilicate of from 0.25 : 1 to 1.00 : 1.
7. A process as claimed in claim 1, wherein nonionic surfactant is sprayed on in a weight ratio to the alkali metal aluminosilicate of at least 0.30 : 1.
8. A process as claimed in claim 6, wherein nonionic surfactant is sprayed on in a weight ratio to the alkali metal aluminosilicate of from 0.30 : 1 to 0.70 : 1.
9. A process as claimed in claim 1, wherein the powder obtained, after the admixture of the alkali metal aluminosilicate and the spray-on of the nonionic surfactant, gives a dispenser residue (as hereinbefore defined) at least 20% by weight less than that given by the base powder.
10. A process as claimed in claim 9, wherein the powder obtained, after the admixture of the alkali metal aluminosilicate and the spray-on of the nonionic surfactant, gives a dispenser residue (as hereinbefore defined) at least 30% by weight less than that given by the base powder.
11. A process as claimed in claim 1, wherein the base powder gives a dispenser residue (as hereinbefore defined) of at least 30% by weight.
12. A process as claimed in claim 11, wherein the base powder gives a dispenser residue (as hereinbefore defined) of at least 50% by weight.

- 19 - C.3243
13. A process as claimed in claim 11, wherein the base powder gives a dispenser residue (as hereinbefore defined) of at least 70% by weight.
14. A process as claimed in claim 1, wherein the base powder has a bulk density of less than 500 kg/m3.
15. A process as claimed in claim 14, wherein the base powder has a bulk density within the range of from 400 to 500 kg/m3.
16. A process as claimed in claim 1, wherein the base powder contains alkali metal aluminosilicate.
17. A process as claimed in claim 16, wherein the base powder contains not more than 50% by weight of alkali metal aluminosilicate.
18. A process as claimed in claim 1, wherein the base powder contains sodium carbonate.
19. A process as claimed in claim 1, wherein the base powder is substantially free of inorganic phosphate builders.
20. A process as claimed in claim 1, wherein the base powder contains at least 20% by weight of detergent-active compounds.
21. A process as claimed in claim 1, wherein the base powder is prepared by spray-drying an aqueous slurry.
22. A detergent powder prepared by a process as claimed in claim 1.

- 20 - C.3243
23. A detergent powder as claimed in claim 22, having a bulk density of at least 500 kg/m3.
CA000598302A 1988-05-06 1989-05-01 Detergent powders and process for preparing them Expired - Fee Related CA1321337C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888810821A GB8810821D0 (en) 1988-05-06 1988-05-06 Detergent compositions & process for preparing them
GB8810821.2 1988-05-06

Publications (1)

Publication Number Publication Date
CA1321337C true CA1321337C (en) 1993-08-17

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Country Status (10)

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US (1) US5030379A (en)
EP (1) EP0341072B1 (en)
JP (1) JPH0832917B2 (en)
AU (1) AU621613B2 (en)
BR (1) BR8902112A (en)
CA (1) CA1321337C (en)
DE (1) DE68926866T2 (en)
ES (1) ES2088893T3 (en)
GB (1) GB8810821D0 (en)
ZA (1) ZA893328B (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5474699A (en) * 1991-05-31 1995-12-12 Colgate-Palmolive Co. Phosphate containing powered automatic dishwashing composition with enzymes
US5693602A (en) * 1991-05-31 1997-12-02 Colgate-Palmolive Co. Spray dried powered automatic dishwashing composition containing enzymes
EP0660873B2 (en) * 1992-09-01 2006-05-31 The Procter & Gamble Company High density granular detergent composition
TR27586A (en) * 1992-09-01 1995-06-13 Procter & Gamble Processes and compositions made with process to make high-density granular detergent.
US5453215A (en) * 1992-09-08 1995-09-26 Lever Brothers Company, Division Of Conopco, Inc. Process for producing concentrated laundry detergent by manufacture of low moisture content detergent slurries
ZA936554B (en) * 1992-09-08 1995-03-06 Unilever Plc Detergent composition and process for its production.
ATE180274T1 (en) * 1993-03-30 1999-06-15 Procter & Gamble SODIUM ALUMINUM SILICATE AND HYDROPHOBIC SILICIC ACID FLOWING AID FOR DETERGENT POWDER
US5691294A (en) * 1993-03-30 1997-11-25 The Procter & Gamble Company Flow aids for detergent powders comprising sodium aluminosilicate and hydrophobic silica
USH1604H (en) * 1993-06-25 1996-11-05 Welch; Robert G. Process for continuous production of high density detergent agglomerates in a single mixer/densifier
WO1995010595A1 (en) * 1993-10-15 1995-04-20 The Procter & Gamble Company Continuous process for making high density detergent granules
CN1079825C (en) * 1994-03-28 2002-02-27 花王株式会社 Process for producing high-bulk-density detergent particles
DE19500644B4 (en) * 1995-01-12 2010-09-09 Henkel Ag & Co. Kgaa Spray-dried detergent or component thereof
DE19524287A1 (en) * 1995-07-06 1997-01-09 Henkel Kgaa Highly compacted detergent with good cold water solubility or dispersibility - comprises compacted core of active and auxiliary substances coated with relatively coarse particles of same substances with the aid of a solid, cold water soluble binder.
US5714450A (en) * 1996-03-15 1998-02-03 Amway Corporation Detergent composition containing discrete whitening agent particles
US5714451A (en) * 1996-03-15 1998-02-03 Amway Corporation Powder detergent composition and method of making
WO1997033958A1 (en) * 1996-03-15 1997-09-18 Amway Corporation Discrete whitening agent particles, method of making, and powder detergent containing same
AU2074397A (en) * 1996-03-15 1997-10-01 Amway Corporation Powder detergent composition having improved solubility
EP0912716A1 (en) * 1996-05-07 1999-05-06 The Procter & Gamble Company Process for making agglomerated detergent compositions having improved flowabality
US6177397B1 (en) 1997-03-10 2001-01-23 Amway Corporation Free-flowing agglomerated nonionic surfactant detergent composition and process for making same
GB9711356D0 (en) 1997-05-30 1997-07-30 Unilever Plc Particulate detergent composition
HUP0002906A3 (en) 1997-05-30 2003-02-28 Unilever Nv Free-flowing particulate detergent composition
GB9711359D0 (en) * 1997-05-30 1997-07-30 Unilever Plc Detergent powder composition
GB9711350D0 (en) * 1997-05-30 1997-07-30 Unilever Plc Granular detergent compositions and their production
DE19859729A1 (en) * 1998-12-23 2000-06-29 Henkel Kgaa Spray-dried granules
JP4189213B2 (en) * 2002-08-30 2008-12-03 花王株式会社 Detergent particles
JP5309504B2 (en) * 2006-09-22 2013-10-09 住友化学株式会社 Powdered composition containing coated pesticide

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921360B2 (en) * 1976-07-31 1984-05-19 ライオン株式会社 Modification method of granular detergent
US4411809A (en) * 1976-12-02 1983-10-25 Colgate Palmolive Company Concentrated heavy duty particulate laundry detergent
US4260651A (en) * 1976-12-02 1981-04-07 Colgate-Palmolive Company Phosphate-free concentrated particulate heavy duty laundry detergent
ZA776946B (en) * 1976-12-02 1979-06-27 Colgate Palmolive Co Free flowing high bulk density particulate detergent softener
US4248911A (en) * 1976-12-02 1981-02-03 Colgate-Palmolive Company Concentrated heavy duty particulate laundry detergent
US4231887A (en) * 1979-06-26 1980-11-04 Union Carbide Corporation Zeolite agglomerates for detergent formulations
EP0061296B1 (en) * 1981-03-20 1984-10-24 Unilever Plc Process for the manufacture of detergent compositions containing sodium aluminosilicate
JPS5921360A (en) * 1982-07-28 1984-02-03 Tokiwa Shokubutsu Kagaku Kenkyusho:Kk Process for stable coloring of food made from wheat flour
JPS5941680A (en) * 1982-08-31 1984-03-07 Shimadzu Corp Apparatus utilizing wind force
JPS6096698A (en) * 1983-10-31 1985-05-30 ライオン株式会社 Manufacture of granular detergent composition
JPS6164798A (en) * 1984-09-05 1986-04-03 花王株式会社 Production of high density detergent improved in flowability
JPS6169897A (en) * 1984-09-14 1986-04-10 花王株式会社 Production of high density detergent improved in flowability
JPS6189300A (en) * 1984-10-09 1986-05-07 ライオン株式会社 Production of granular detergent composition containing nonionic surfactant
US4970017A (en) * 1985-04-25 1990-11-13 Lion Corporation Process for production of granular detergent composition having high bulk density
CA1337041C (en) * 1985-10-09 1995-09-19 Brett Alan Evans Granular detergent compositions having improved solubility
CA1275019A (en) * 1985-10-09 1990-10-09 The Procter & Gamble Company Granular detergent compositions having improved solubility
GB8525269D0 (en) * 1985-10-14 1985-11-20 Unilever Plc Detergent composition
GB8526998D0 (en) * 1985-11-01 1985-12-04 Unilever Plc Detergent powder
EP0229671B1 (en) * 1986-01-17 1991-03-13 Kao Corporation High-density granular detergent composition
ES8706805A1 (en) 1986-05-13 1987-07-01 Henkel Iberica Water-soluble granular detergent component prodn.
GB8622565D0 (en) * 1986-09-19 1986-10-22 Unilever Plc Detergent composition
MY102396A (en) * 1986-11-07 1992-06-17 Unilever Plc Detergent granules and a process for their preparation
GB8710290D0 (en) * 1987-04-30 1987-06-03 Unilever Plc Preparation of granular detergent composition
US4931203A (en) * 1987-06-05 1990-06-05 Colgate-Palmolive Company Method for making an automatic dishwashing detergent powder by spraying drying and post-adding nonionic detergent
GB8829710D0 (en) * 1988-12-20 1989-02-15 Unilever Plc Improved zeolite compositions

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AU3401689A (en) 1989-11-09
JPH01318098A (en) 1989-12-22
DE68926866T2 (en) 1996-12-12
EP0341072A3 (en) 1990-08-08
ES2088893T3 (en) 1996-10-01
GB8810821D0 (en) 1988-06-08
EP0341072B1 (en) 1996-07-24
AU621613B2 (en) 1992-03-19
DE68926866D1 (en) 1996-08-29
ZA893328B (en) 1991-01-30
US5030379A (en) 1991-07-09
EP0341072A2 (en) 1989-11-08
BR8902112A (en) 1990-01-02
JPH0832917B2 (en) 1996-03-29

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